Parkatmyhouse.com is a terrific idea, when you go to work in your car what are you doing ?.
You are leaving your empty space at home, empty space that could be used for somebody else to park in. Maybe your home is in the city or close to somebody elses work and they could be using your space, everybody is happy. You get paid, the driver gets a space and it gives the impression somebody is at home.
Darn I wish I could of thought of this idea.
-Kyle